Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: The association between symbiotic bacteria and the accessory nidamental gland of squid Loligo opalescens
Student Author(s): Lai, Cindy J.
Faculty Advisor(s): Epel, David
Pages: 32
Location: Final Papers Biology 175H
Date: June 1994
Abstract: The nature of the association between the symbiotic bacteria and the accessory nidamental glands of the female squid, Loligo opalescens, was investigated using light, fluorescent, and transmission electron microscopy. The accessory nidamental glands of three female squids at varying stages of sexual maturity were observed and two possible differences noted as functions of maturity. Two observations were significant: 1) the association between the gland and the bacteria might vary at different stages of sexual maturity, and 2) the morphology of the bacteria differed depending on the stage of development. Three hypotheses have been proposed that may explain the observed trends. The first suggests the varying association is a cyclic phenomenon during which the bacteria grow according to a characteristic lag, exponential, and stationary phase situation. The second explanation is that the gland secretes varying amounts of product during maturation which dictates the proximity of the bacteria to the gland. The third theory is based on the idea that distinct species of bacteria colonize the accessory nidamental gland at different developmental stages.